Search Results - "Empizo Melvin John F."

High surface laser-induced damage threshold of SrB4O7 single crystals under 266-nm (DUV) laser irradiation by Tanaka, Yasunori, Murai, Ryota, Takahashi, Yoshinori, Sugita, Tsuyoshi, Toh, Daisetsu, Yamauchi, Kazuto, Aikawa, Sora, Marui, Haruki, Umeda, Yuji, Funamoto, Yusuke, Kamimura, Tomosumi, Empizo, Melvin John F, Imanishi, Masayuki, Mori, Yusuke, Yoshimura, Masashi

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Investigations on the electric-dipole allowed 4f25d → 4f3 broadband emission of Nd3+-doped 20Al(PO3)3-80LiF glass for potential VUV scintillator application by Empizo, Melvin John F., Minami, Yuki, Yamanoi, Kohei, Shimizu, Toshihiko, Yoshimura, Masashi, Sarukura, Nobuhiko, Murata, Takahiro, Yamaji, Akihiro, Yoshikawa, Akira, Guzik, Malgorzata, Guyot, Yannick, Boulon, Georges, Cadatal-Raduban, Marilou

“…We report the absorption and emission properties of neodymium (Nd3+)-doped APLF glasses [20Al(PO3)3-80LiF + x NdF3, x = 0.5–2.0 mol%] as potential vacuum…”
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High pressure band gap modification of LiCaAlF6 by Shimizu, Toshihiko, Luong, Mui Viet, Cadatal-Raduban, Marilou, Empizo, Melvin John F., Yamanoi, Kohei, Arita, Ren, Minami, Yuki, Sarukura, Nobuhiko, Mitsuo, Nakai, Azechi, Hiroshi, Pham, Minh Hong, Nguyen, Hung Dai, Ichiyanagi, Kouhei, Nozawa, Shunsuke, Fukaya, Ryo, Adachi, Shin-ichi, Nakamura, Kazutaka G., Fukuda, Kentaro, Kawazoe, Yoshiyuki, Steenbergen, Krista G., Schwerdtfeger, Peter

“…First-principles density functional calculations together with experimental measurements demonstrate that pressure (uniform and uniaxial) increases the band…”
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Photoluminescence and enhanced photocatalytic activity of mechanically activated graphite-zinc oxide composites by Agulo, Ian Jasper, Rosario, Princess, Yague, Krystelle, Balod, Mary Joy, Empizo, Melvin John F, Agulto, Verdad C, Shimizu, Toshihiko, Madarang, May Angelu, Ngaloy, Roselle, Sarukura, Nobuhiko

“…In this work, we show evidence of enhanced photocatalytic activity in mechanically activated graphite-zinc oxide (ZnO) composites using time-resolved…”
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Total internal reflection-based side-pumping configuration for terawatt ultraviolet amplifier and laser oscillator development by Cadatal-Raduban, Marilou, Pham, Minh Hong, Pham, Duong Van, Bui, Duong Thi Thuy, Yamanoi, Kohei, Takeda, Kohei, Empizo, Melvin John F., Mui, Luong Viet, Shimizu, Toshihiko, Nguyen, Hung Dai, Sarukura, Nobuhiko, Fukuda, Tsuguo

“…A two-side-pumping scheme that is based on total internal reflection in a diamond-cut Ce 3+ :LiCaAlF 6 crystal suitable for the development of an ultraviolet…”
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Photoluminescence properties of a single ZnO microstructure for potential scintillator applications by Empizo, Melvin John F., Fukuda, Kazuhito, Arita, Ren, Minami, Yuki, Yamanoi, Kohei, Shimizu, Toshihiko, Sarukura, Nobuhiko, Vargas, Ray M., Salvador, Arnel A., Sarmago, Roland V.

“…•ZnO microstructures are successfully prepared by the carbothermal reduction route.•A single free-standing ZnO microribbon exhibits UV and visible emissions…”
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Anisotropic complex refractive index of β-Ga2O3 bulk and epilayer evaluated by terahertz time-domain spectroscopy by Agulto, Verdad C., Toya, Kazuhiro, Phan, Thanh Nhat Khoa, Mag-usara, Valynn Katrine, Li, Jiajun, Empizo, Melvin John F., Iwamoto, Toshiyuki, Goto, Ken, Murakami, Hisashi, Kumagai, Yoshinao, Sarukura, Nobuhiko, Yoshimura, Masashi, Nakajima, Makoto

“…Homoepitaxial film and semi-insulating bulk β-Ga2O3 with (001) orientation were studied using terahertz time-domain spectroscopy (THz-TDS) in the frequency…”
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Optical transmittance investigation of 1-keV ion-irradiated sapphire crystals as potential VUV to NIR window materials of fusion reactors by Iwano, Keisuke, Yamanoi, Kohei, Iwasa, Yuki, Mori, Kazuyuki, Minami, Yuki, Arita, Ren, Yamanaka, Takuma, Fukuda, Kazuhito, Empizo, Melvin John F., Takano, Keisuke, Shimizu, Toshihiko, Nakajima, Makoto, Yoshimura, Masashi, Sarukura, Nobuhiko, Norimatsu, Takayoshi, Hangyo, Masanori, Azechi, Hiroshi, Singidas, Bess G., Sarmago, Roland V., Oya, Makoto, Ueda, Yoshio

“…We investigate the optical transmittances of ion-irradiated sapphire crystals as potential vacuum ultraviolet (VUV) to near-infrared (NIR) window materials of…”
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Formation energy crossings in Ga2O3-Al2O3 quasibinary system: ordered structures and phase transitions in (Al x Ga1−x )2O3 by Gueriba, Jessiel Siaron, Mizuseki, Hiroshi, Empizo, Melvin John F., Yamanoi, Kohei, Sarukura, Nobuhiko, Tamiya, Eiichi, Kawazoe, Yoshiyuki, Akaiwa, Kazuaki, Takahashi, Isao, Yoshikawa, Akira

“…A quasibinary system of Ga2O3-Al2O3 offers a range of applications in wide bandgap semiconductor engineering. Different polymorphs and concentrations of…”
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Low-energy femtosecond pulsed laser deposition of cerium (IV) oxide thin films on silicon substrates by De Mesa, Joseph A., Rillera, Angelo P., Empizo, Melvin John F., Sarukura, Nobuhiko, Sarmago, Roland V., Garcia, Wilson O.

“…•CeO2 thin films are successfully deposited through low-energy (∼8.0 nJ) fs-PLD.•Post-deposition annealing is vital to improving the CeO2 film properties.•A…”
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Nanosecond alpha-ray response and gamma-ray radiation resistance of a hydrothermal-grown bulk ZnO single crystal by Empizo, Melvin John F., Yamanoi, Kohei, Abe, Yuki, Shinohara, Keito, Agulto, Verdad C., Arikawa, Yasunobu, Shimizu, Toshihiko, Yoshimura, Masashi, Sarukura, Nobuhiko, Fukuda, Tsuguo

“…•Bulk ZnO single crystals exhibit nanosecond response under alpha-ray excitation.•Non-irradiated and gamma-ray-irradiated crystals exhibit similar…”
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Kyropoulos growth of a 300 g SrB4O7 single crystal using a twin-type stirring blade by Tanaka, Yasunori, Murai, Ryota, Takahashi, Yoshinori, Empizo, Melvin John F., Usami, Shigeyoshi, Maruyama, Mihoko, Imanishi, Masayuki, Mori, Yusuke, Yoshimura, Masashi

“…We report the successful Kyropoulos growth of a large strontium tetraborate (SrB4O7, SBO) single crystal that weighs more than 300 g. In order to grow the…”
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Strong yellow emission of high-conductivity bulk ZnO single crystals irradiated with high-power gyrotron beam by Kato, Kosaku, Qiu, Hongsong, Khutoryan, Eduard M., Tatematsu, Yoshinori, Tani, Masahiko, Idehara, Toshitaka, Yamaguchi, Yuusuke, Fukunari, Masafumi, Maeda, Yuto, Takayama, Kyoya, Minami, Yuki, Empizo, Melvin John F., Kurihara, Takayuki, Yamanoi, Kohei, Shimizu, Toshihiko, Takano, Keisuke, Sarukura, Nobuhiko, Fukuda, Tsuguo, Yoshimura, Masashi, Nakajima, Makoto

“…We report the strong yellow emission of bulk ZnO single crystals irradiated with the high-power gyrotron beam. Hydrothermally grown bulk crystals with high…”
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Hydrothermal growth of vertically aligned ZnO nanorods as potential scintillator materials for radiation detectors by Angub, Maria Cecilia M., Vergara, Christopher Jude T., Husay, Horace Andrew F., Salvador, Arnel A., Empizo, Melvin John F., Kawano, Keisuke, Minami, Yuki, Shimizu, Toshihiko, Sarukura, Nobuhiko, Somintac, Armando S.

“…We investigate the hydrothermal growth of zinc oxide (ZnO) nanorods to realize their potential scintillator applications. Vertically aligned ZnO nanorods were…”
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Picosecond UV emissions of hydrothermal grown Fe3+-doped ZnO microrods by Salazar, Kloudene A., Agulto, Verdad C., Empizo, Melvin John F., Shinohara, Keito, Yamanoi, Kohei, Shimizu, Toshihiko, Sarukura, Nobuhiko, Yago, Allan Christopher C., Kidkhunthod, Pinit, Sattayaporn, Suchinda, Samson, Vallerie Ann I., Sarmago, Roland V.

“…•Fe3+-doped ZnO microrods were fabricated by low-energy hydrothermal method.•Incorporation of 6-coordinated Fe3+ was confirmed using XANES spectroscopy.•Fe…”
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Radiation resistance of praseodymium-doped aluminum lithium fluorophosphate scintillator glasses for laser fusion experiments by Shinohara, Keito, Empizo, Melvin John F., Cadatal-Raduban, Marilou, Yamanoi, Kohei, Shimizu, Toshihiko, Yoshimura, Masashi, Sarukura, Nobuhiko, Murata, Takahiro, Uy, Mayrene A., Abe, Hitoshi, Yoshikawa, Akira, Boulon, Georges, Dujardin, Christophe

“…We report the gamma ( γ )-ray radiation resistance of praseodymium (Pr 3+ )-doped aluminum lithium fluorophosphate scintillator glasses. For its assessment as…”
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Low-threshold amplified UV emission of optically pumped ZnO-polymer nanocomposites by Agulto, Verdad C., Empizo, Melvin John F., Shinohara, Keito, Micah L. Inguito, Jonah, Magallanes, Bee Jay, Nalayog, Marvin B., Umeno, Daisuke, Salazar, Kloudene A., Judicpa, Mia Angela N., Yamanoi, Kohei, Shimizu, Toshihiko, Yago, Allan Christopher C., Sarmago, Roland V., Sarukura, Nobuhiko

“…•Composites of ZnO nanorods and polymer films were fabricated by wet chemical methods.•ZnO-polymer composites exhibit amplified UV emission unlike the as-grown…”
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Structure disorder observation of fluoropolymers composed of vinylidene fluoride and tetrafluoroethylene in supercritical CO2 using time-resolved small- and wide-angle X-ray scattering by Yamanoi, Kohei, Shibuta, Satoshi, Shiro, Atsushi, Noumi, Masao, Empizo, Melvin John F., Cadatal-Raduban, Marilou, Sarukura, Nobuhiko, Nishikawa, Keiko, Morita, Takeshi

“…Fluoropolymers have a growing range of applications in many industries. Neat fluoropolymers and fluorinated copolymers were prepared via the suspension…”
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Bulk laser-induced damage resistance of SrB4O7 single crystals under 266 nm DUV laser irradiation by Maegaki, Yutaka, Tanaka, Yasunori, Marui, Haruki, Koizumi, Atsushi, Tanaka, Kota, Kamimura, Tomosumi, Murai, Ryota, Takahashi, Yoshinori, Empizo, Melvin John F., Usami, Shigeyoshi, Imanishi, Masayuki, Maruyama, Mihoko, Mori, Yusuke, Yoshimura, Masashi

“…The bulk laser-induced damage threshold (LIDT) of a strontium tetraborate (SrB4O7, SBO) single crystal has been measured for the first time. Single-shot and…”
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Interplay of Zn(OAc)2 concentration, morphology, and emission in hydrothermal-grown ZnO nanostructures by Solibet, Erick John Carlo D., Empizo, Melvin John F., Angub, Maria Cecilia M., Veloz, Raymund C., Vergara, Christopher Jude T., Husay, Horace Andrew F., Yamanoi, Kohei, Shimizu, Toshihiko, Estacio, Elmer S., Salvador, Arnel A., Sarukura, Nobuhiko, Somintac, Armando S.

“…•ZnO nanostructures are fabricated using different Zn(OAc)2 concentrations.•Lower Zn(OAc)2 concentrations result in highly oriented ZnO nanorods.•Higher…”
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